Machine for drawing out the yarn from textile fabrics for the production of openwork



April 17, 1928. v I 1,666,812

J. B. DURUPT MACHINE FOR DRAWING OUT THE YARN FROM TEXTILE FABRICS FOR THE PRODUCTION OF OPENWORK Filed March 26, 1925 4 Sheets-Sheet 1 VIII/(Mm E l 1 1/4/11 J \fimamwwg Aprll 17, 1928. 1,666,812

, J. B. DURUPT MACHINE FOR DRAWING OUT THE YARN FROM TEXTILE FABRICS FOR THE PRODUCTION OF OPENWORK Filed March 26, 1925 4 Sheets-Sheet 2 I0 V h 7 "In I 11 April 17, 1928,- 1,666,812

J. B. DURUPT MACHINE FOR DRAWING OUT THE YARN FROM TEXTILE FABRICS FOR THE PRODUCTION OF OPENWORK Filed March 26, 1925 4 Sheets-Sheet 5 Aprll 17, 1928. 1,666,812

J. B. DURUPT MACHINE FOR DRAWING OUT THE YARN FROM TEXTILE FABRICS FOR THE PRODUCTION OF OPENWORK Filed March 26, 1925 4 Sheets-Sheet. 4

Patented Apr. 17, 1928.

JEAN BAPTISTE UNITED )STATES PATENT. OFFICE.

DURUPT, OF J'EUXEY, NEAR 'EPINAL, FRANCE, ASSIGNO'B T0 SOCIETE V PELLAUMAIL-MOUTEL & 0115., OF CHOLET, FRANCE.

MACHINE non DRAWING our THE YARN FROM TEXTILE rannrosron THE PRODUC- TION or OPENWORK. I I 1 Application filed March 26, 1925, Serial No. 18,459, and in France October 18, 1924.

The present invention relates to a machine for drawing out the yarn from textile fabrics, comprising in principle two blades amount equal to double the distance between;

the said blades, whereby the pushing blade will act upon the middleof each section of the yarn which has been cut. 1 V In order that the cutting and pushin operations may be effected in favourable conditions, it is necessary. that the fabric shall be well stretched during the insertion of the blades and for this purpose the machine comprises the following features:

Firstly, the fabric is given'a certain tension during its forward motion, by means of a claw fork which is disposed below the machine table and whose branches are separated during the forward motion of the said fork,

the claws of the same drawing forward the fabric by seizing it betweentwo movable plates of a special presser foot.

Secondly, a gripping device assures a strong tension upon the fabric and lowers itagainst a stationary frame resembling a hand embroidery frame.

'Lastly, the apparatus comprises addi-- tional features such as a guide forthe proper engagement of the fabric below the said blades, and a clearing device for the Y cross section and in plan view in F1gs.-1

removal of the sections of yarn which may adhere to the pushing blade before its removal from the fabric.

The following description with reference to the appended drawings which are'given by way .of example sets forththesaid invention. I

Figs. 1 to 1 are diagrammatic views showing the method of drawingthe yarn.

Fig. ,5 is a vertical section of the dev ce for drawing the yarn, which isv mounted upon the table of a sewing machine of a known type. p p

Fig. 6 is a plan view of the machine table,

with the mechanism below the table removed.

blades.

Fig. 6.

Figs. 8 and 9 are detail views, in vertical 7 sectionand in plan, of. the lower gripping device.

Figs. 10 and 11 areelevational' and plan views of the upper gripping device formlng the presser foot.

Fig. 12 is a section on the line of 7 Fig. 11. g

Fig. 13 is a view of the lower part of Fig. 14 is a front viewof the two blades when separated. p Fig. 15 is a view of said blades on a larger scale.

Fig. 16 is a partial side view of Fig. 13 on alarger scale.

Fig. 17 is a vertical section of the comhination of the two blades.

Figs. 18 and l9 are detail views showing two different positionsof the clearing device serving for the removal of the yarn which may adhere to the pushing blade when I it ascends.

Figs. 20, 21, 22, 23 are diagrammatic sectional views showing the operation of the claws and'the gripping devices. r

Figs. 20 and 23 are sections on the lines ZZ and Y Y .Of'Figs. 20 and'21.

Figs. 20 andfll are plan views ofFigs.

20 and 21.

The principle'of the yarn-drawing ma-v chine, the .object of the invention, will be set forth. with reference to the diagrammatic Figures 1' to tin which the different warp and woof yarns are spread out for the sake .of clearness. i

The fabric which is disposed as shown in and 3, moves forward in the direction of the arrow 2. A set, of two blades is displaced perpendicularly to the fabric whereof one blade 3 has a cuttingedge and acts as a cut- The saidmachine s so regulated that each forward movement of the fabric is equal to doublethe spacing iof the said At each descent of the vsaid device, the blade ,3 will .cuta certain number of threads 1 of the fabric while leaving intact the woof yarn 1 said blade or needle 3 will thus cut out a certain number of elements or sections of yarn 1 and upon each descent of the set of blades the yarn will be pushed down by the blade or needle 4, which as shown in Figs. 1 and 2 will exercise a downward thrust upon the middle of the elements 1 which have just been cut.

The two assembled blades, Fig. 17, are mounted by means of a tapered shank, or in like manner, in the support 5 of a sewing machine, and are given a Vertical reciprocating motion by the mechanism of the machine.

r In the place of the known presser foot, there is secured to the end of the usual rod 6, Fig.

5, the upper branch 7 of the gripping device which is shown in detail in Figs. 11, 12 and '13, and comprises a central striated plate 8 having at the middle part a large aperture 8 to the sides of the said plate are pivoted the respective shoes 9 which have a certain play in order to move freely on their'axis 11 and also to ascend to a slight degree; they are maintained in the lower position by a small spring 12. To the plate 8 is secured the arm 13 which serves to guide the fabric.

Below the table of the sewing machine is disposed the mechanism providing for the tension and for the forward motion of the fabric. The said mechanism comprises the lower branch of the gripping device which is constituted bythe striated plate 16 situated opposite the plate 8 of the upper branch 7 the plate 16 rests through the medium of four small springs 17 upon a stationary plate 18 having two parallel flanged edges 18 (Figsf20 and 28) forming the parallel sides of a frame upon which the fabric is stretched as will be hereinafter set forth. The flanges 18 engage a rectangular slot 16 in theplate 16, which can thus slide vertically on the said flanges.

The plate 18 has two lateral holes 20 affording passage for two respective claws 21, when the latter are raised; the said claws, which move at the same time, are actuated by a suitable mechanism which raises them in such manner as to press the fabric between them and the shoe 9. At this time the claws move forward and are at the same time separated from each other in order to provide for the forward motion of the fabric while stretching the latter, andthen descend in order to allow the plates or clamps 8 and 1G to energetically stretch the fabric upon the parallel edges 18 after the manner of an embroidery frame.

The operation is as follows: The claws 21 are provided at the end of suitable arms 22' which form the two branches of a fork, this being pivoted (with some play) on the axis 23 at the end of a lever 24 mounted on a shaft 25; this latter is given an angular reciprocating motion by means consisting of the lever 26, the link 27, and the bent lever 28 pivoting on the axle 28, whose forked end is controlled by a cam 29 mounted on the shaft 30 of the sewing machine (Figs. 6 and 7). Below each arm 22 ismounted a reaction spring 31 attached to a fixed point 32 of the machine frame. i

The forward ends 22 of the levers 22 carrying the claws 21 rest upon tappets 38 formed by the rear ends of the fork 33 pivoting at 34, which are given a reciprocating motion by the cam 36 acting on the fork 3'? mounted at the end of the shaft 34, which latter turns in two bearings mounted on the machine. The tappets 33 comprise the'vertical extensions 38 in friction contact with the inner faces of the claws 21; said extensions (Figs. 20 and 21 have an external face in the inclined position in order to spread apart the two claws 21 as they move forward. A spring 10 (Fig. 20") urges the said claws 21 together.

The operation of the machine is as followsz" The branch 7 of the gripping or clamping device which acts as the presser foot being raised in the usual manner, the fabric is placed between the platesf8 and 16 when the same are in the raised position. The

presser footv is then lowered. The several held between the claws 21, which are now in the raised position, and the shoes 9; at

this time, the claws 21 move forward in the.

direction of the arrows Fig. 20, sliding upon the tappet 33 which remains stationary. In this motion the said claws will open out, while sliding upon the said faces, thus afford ing the suitable tension of the fabric; the opening of the said claws is made possible by'the play provided for the axis23. This opening of the said claws will be observed in Figs. 20 and 21 which correspond to the beginning and the end of the opening movement.

The claws 21 then descend, and the presser foot, which is held in the raised position by the said claws will follow this movement and 1 will descend thereupon under the action of a spring (not shown) which urgesthe presser footdownwardly; in this downward motion of the presser foot, the plate 8 which is secured thereto will press the fabric, which As above stated, the claws 21 can be lowered by reason'of the descent of the tappet 33 which moves from the position shown in Fig. 21 into that shown in Fig. 22, the said claws being lowered in virtue of the traction exercised by the spring 31 below the said claws.

The claws 21 having assumed theirextreme position, Fig. 22, they are then brought back by a sliding motion upon the tappet- 33 which remains stationary, until they attain the position shown in Fig. 23, v

This forward motion may be regulated as in the known machines, for instance by changing the length of the lever arm 28 28". For this purpose the bent extension 25 of the fork 28 forms a guide, and the axis 28 can be moved therein by a micrometric screw mechanism or the like.

The said machine, the object of the invention, comprises a special device termed clearing device which serves for the removal of the cut ends of yarn which may remain attached to the rough edges of the pushing blade 4; said device which is shown in plan view in Figs. 18 and '19 consists of a plate 45 which is slidable below the plate 18 to which it is attached by the pin 46 engaging the slot 47 in the plate 45.

springs 48, 49 surrounding the rod 50 whose end 50 is pivoted to the axis 50 mounted between the branches 22 of the claws 21, as shown in Fig. 6. In the sliding plate 45 is formed a slot 51 in which is engaged the stationary plate 52 apertured at 53 for the insertion of the blade or needle 3, and the same constitutes an edge 54 which comes between the blades 3 and 4 when they rise and descend, Fig; 18.

The said clearing device operates in the following manner, Figs. 18 and 19.

.Vhen the said double blade is driven into the fabric, the plate 45 will be situated at extreme left, Fig. 19, and there will be a space between the edge 54 of the plate 52 and the edge 45 of the plate 45; the driving blade 4 moves in this space. Upon the ascent of the blades, the claws 21 will move back, as above stated, and will draw back' (through the medium of the spring 48) the plate 45 in the direction of the arrow, Fig. 19. The edge 45 enters into elastic contact with one face of the driving blade 4 whose other face is in contact with the edge 54 of the plate 52. The combination of the two edges 45 and 54 will arrest the yarn which has become caught in'the toothed part of the blade 4 when thelatter rises.

When the said blades or needles become disengaged from the fabric, the clawde vice 21 moves forward, drawing with it (through the medium of the spring 49) the plate 45 in the direction of the arrow, Fig. 18, and the latter will spread apart the edges 54 and 45 and thus bring the elements into the position of Fig. 19.

Obviously, the said device is susceptible of various modifications without departing from the principle of the invention; in particular, it may comprlse a set of blades 3 and'4 having different widths according to the height of the open workwhich is to be formed in the said fabric.

What I claim is v 1. In a machine for drawing out yarn from textile fabric for the production of fabric, claws having serrated faces to seize the fabric, means for separating the claws and for moving them forward simultane ously to stretch the fabric, means for lowering the stretched fabric onto the frame, .a cutting blade for severing threads of the fabric, a toothed blade for engaging the severed threads, means to reciprocate the blades through the fabric, a fixed plate and a movable plate mounted below the fabric frame and having cooperating flanges open work, a stationary frame to receive the formed thereon, and-resilient means for actuating the movable plate to bring said flanges into contact with the toothed blade to arrest the threads attached to the latter. 2. In a machine for drawing'out yarn from textile fabrics for the production of open-work, a holder, a cutting blade and a toothed blade carried by the latter, claws adapted to seize the fabric, means for imparting a simultaneous forward and outward movement to said claws for the lateral tension of the fabric, pairs of grips, means whereby said pairs of grips will seize the fabric preliminarily stretched by the claws while said claws are withdrawn therefrom, stationary parallel vertical plates, means for lowering the said grips to additionally stretch the fabric over the edges of said plates, and means for moving the blades through the fabric.

i In testimony whereof I have signed this specification. 

